Log Message:
Update sysutils/consul to 1.0.3.

SECURITY:
- ui: Patched handlebars JS to escape `=` to prevent potential XSS
  issues.

BREAKING CHANGES:
- agent: Updated Consul's HTTP server to ban all URLs containing
  non-printable characters (a bad request status will be returned for
  these cases). This affects some user-facing areas like key/value entry
  key names which are carried in URLs.

FEATURES:
- agent: Added retry-join support for Azure Virtual Machine Scale
  Sets.

IMPROVEMENTS:

- agent: Added agent-side telemetry around Catalog APIs to provide
  insight on Consul's operation from the user's perspecive.
- agent: Added the `NodeID` field back to the /v1/agent/self
  endpoint's `Config` block.
- api: Added missing `CheckID` and `Name` fields to API client's
  `AgentServiceCheck` structure so that IDs and names can be set when
  registering checks with services.

BUG FIXES:
- agent: Fixed an issue where config file symlinks were not being
  interpreted correctly.
- agent: Ignore malformed leftover service/check files and warn about
  them instead of refusing to start.
- agent: Enforce a valid port for the Serf WAN since it can't be
  disabled.
- agent: Stopped looging messages about zero RTTs when updating
  network coordinates since they are not harmful to the algorithm.
  Since we are still trying to find the root cause of these zero
  measurements, we added new metrics counters so these are still
  observable.
- server: Fixed a crash when POST-ing an empty body to the /v1/query
  endpoint.
- server: (Consul Enterprise) Fixed an issue where unhealthy servers
  were not replaced in a redundancy zone by autopilot (servers
  previously needed to be removed in order for a replacement to occur).
- ui: Added a URI escape around key/value keys so that it's not
  possible to create unexpected partial key names when entering
  characters like `?` inside a key.